Nail clamp



FIG. 1 is a perspective view of a nail clamp showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines and unshaded areas depict portions of the nail clamp that form no part of the design. The surface shading illustrated in the drawings is provided merely to highlight the contour of the design; it is not intended to be illustrative of texture or gloss. 

CLAIM The ornamental design for a nail clamp, as shown and described. 